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Facts & Ground Rules

Miller Park's unique dimensions are designed to maximize every aspect of watching - and playing - America's Pastime. Please observe the following ground rules.

Universal Ground Rules

The Commissioner's Office has issued the following Universal Ground Rules for use in all Major League ballparks this season. Ground Rules pertaining to individual parks are posted separately in those parks.

Ball on the top step (lip) of the dugout is in play. No equipment is permitted to be left on the top step (lip) of the dugout. If a ball hits equipment left on the top step it is dead.

A player is not permitted to step or go into a dugout to make a catch.

A player is permitted to reach into a dugout to make a catch. If a player makes a catch outside the dugout and the player's momentum carries him into the dugout, then the catch is allowed and the ball remains alive as long as the player does not fall while in the dugout. See Rule 6.05(a).

A batted ball in flight can be caught between or under railings and around screens.

A catch may be made on the field tarp.

Batted or thrown ball resting on the rotating signage behind home plate or along first base or third base stands is in play.

The facings of railings surrounding the dugout and photographers' areas are in play.

Any cameras or microphones permanently attached on railings are treated as part of the railings and are in play.

Any recessed railings or poles that are in the dugout and photographers' areas are out of play and should be marked with red to mark them out of play.

Robotic cameras attached to the facing of the backstop screen are considered part of the screen.

A batted ball striking the backstop camera is considered a dead ball.

A thrown ball striking the backstop camera is considered in play.

A ball striking the guy wires that support the backstop is a dead ball.

A ball lodging behind or under canvas on field tarp is out of play.

A ball striking the field tarp and rebounding onto the playing field is in play.

No chairs can be brought out of the dugout or bullpen and onto the playing field.

Movement of Roof and Exterior Wall Panels

Miller Park Roof Information

Undoubtedly, Miller Park's most unique feature is the roof. The only fan-shaped convertible roof in North America guarantees perfect conditions for every game. The 12,000-ton, seven-panel roof opens and closes almost silently in just 10 minutes.

Three panels, each as big as the roof over the Bradley Center in downtown Milwaukee, move over a fixed panel on the third base side. Two more panels move over a fixed panel on the first base side. The roof panels pivot on a fixed point behind home plate, and are each powered by a 60-horsepower engine, or "bogey," that moves along a semi-circular rail system, or "track beam," about 150-feet above the
exterior outfield wall.

Miller Park Dimensions

The field dimensions, designed with the input of Hall of Famer and Brewers legend Robin Yount, are unique and asymmetrical. Yount said he designed the field to play to what he considers the most exciting play in baseball — a runner trying to stretch a single into a double or a double into a triple.